<?php
namespace zake\server\zadb;

class ZaDb
{


    /**
     * @var ZaDb | null
     */
    private static $singleton = null;


    /**
     * @var array
     */
    private $_memory = [];


    /**
     * 构造器
     *
     * @author liu.bin 2020-04-03 23:16
     */
    public static function singleton()
    {
        if(is_null(static::$singleton)){
            static::$singleton = new static();
        }
        return static::$singleton;
    }







}
